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【单选题】
为了引起人们更广泛的关注，世界卫生组织将每年( )“世界艾滋病日”。A.
2.1
B.
3.1
C.
11.1
D.
12.1
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【简答题】已知椭圆 C： x 2 a 2 + y 2 b 2 =1(a＞b＞0) 的右顶点A为抛物线y 2 =8x的焦点，上顶点为B，离心率为 3 2 （1）求椭圆C的方程； （2）过点 (0， 2 ) 且斜率为k的直线l与椭圆C相交于P，Q两点，若线段PQ的中点横坐标是 - 4 2 5 ，求直线l的方程．
【单选题】What is an "operating" cycle?
A.
A cycle of transactions that converts cash inflows to cash outflows, or vice versa.
B.
A cycle where there is receipt of funding from investors, those funds are used to generate returns from investments and operations, and then the funds are returned to investors.
C.
A cycle where a property is purchased that has long-term future benefits for the enterprise, which ultimately results in cash inflows, and then the property is disposed of.
D.
A cycle that involves the purchase of items such as inventory; production, sales, delivery of goods or provision of services; and receipts from customers.
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